SUMMARY
Study on Basic Zoning Information Concerning Renewable Energies (FY 2013)
The introduction of renewable energies is important not only as a countermeasure for global
warming but also from such viewpoints as establishing energy security, developing
autonomous and scattered energy systems and creating new industries and jobs. For thisreason, the Ministry of the Environment (MoE) conducted the Study on the Potential for theIntroduction of Renewable Energies in FY 2009 and FY 2010 and the Development of Basic
Zoning Information in FY 2011 and FY 2012 to estimate the abundance as well as
introduction potential of various types of renewable energies (residential use of PV power,
use of PV for public buildings, onshore and marine wind power, small and medium-scalehydropower , geo-thermal power, geo-heat and solar heat) and their possible introduction
amount(except for geo-heat and solar heat) by different scenarios with a view to developing
basic data for the examination of viable measures to introduce and spread the use ofrenewable energies in the coming years as well as preparing basic zoning information. At thesame time, basic zoning information was developed.
The present work refined the potential of introducing renewable energies investigated inpast years and examined a viable mechanism where basic zoning information such as (i)possible impeding factors other than negative environmental impacts and (ii) intentions ofstakeholders to introduce renewable energies would be gathered, sorted out and centrally
offered to external users. The work was conducted for the purpose of promoting theunderstanding and convenience of using and introducing renewable energies among citizens,public authorities and businesses, etc.
1. Refinement of the Introduction Potential of Each Type of Renewable Energy(1) Refinement of the Introduction Potential of PV Power Generation for Residential
UseThe installation coefficient for detached housing, etc., which has the largest introduction
potential for PV power generation for housing, was revised taking the roof shape by
prefecture into consideration. As a result, the introduction potential was estimated to be 210
million kW,223 billion kWh/year. For the purpose of determining the possible introduction
amount by scenario, three scenarios (purchase price of ¥30, ¥35 or ¥40/kWh) were set forseparate estimation. The resulting possible introduction amount by scenario ranges from 26 to140 million kW or from 28 to 145 billion kWh/year.
(2) Refinement of the Introduction Potential of Wind Power Generation
1) Refinement of the Introduction Potential of Onshore Wind Power Generation
In regard to the conditions of development unfeasibility introduced in the study in past
years, “restriction by the Civil Aeronautics Act” was added for further refinement. An
equipment use factory of 0.1 m/s of the mean wind velocity was set based on Rayleighdistribution and power curve data (onshore: 2,000 kW, maritime: 5,000 kW) to estimate thepotential power generation capacity. The estimated introduction potential is 270 million kWS‐1

or 610 billion kWh/year. Four scenarios (purchase price of ¥15, ¥20, ¥22 and ¥25/kWh) were
set to determine the possible introduction amount by scenario taking an equipment use factorof 0.1 m/s of the mean wind velocity into consideration. The resulting possible introduction
amount by scenario ranges from 71 to 240 million kW or from 220 to 560 billion kWh/year.
2) Refinement of the Introduction Potential of Marine Wind Power Generation
The introduction potential of marine wind power generation was estimated this year withthe same conditions of development unfeasibility used last year. Meanwhile, the windvelocity (80 m above the ground) on the wind conditions map was corrected to the windvelocity at 90 m above the ground as this is the common height for the hub of an offshore
wind generator. As a result, the introduction potential (with a minimum wind velocity of 6.5
m/s and some exemptions for islands) was estimated to be 1,060 million kW or 2,700 billion
kWh/year. Four scenarios (purchase price of ¥22, ¥25, ¥30 and ¥35/kWh) were set todetermine the possible introduction amount by scenario taking an equipment use factor of 0.1m/s of the mean wind velocity into consideration. The resulting possible introduction amountby scenario (with a minimum wind velocity of 6.5 m/s and some exemptions for islands)
ranges from 6.5 to 840 million kW or 19 to 2,200 billion kWh/year.
(3) Refinement of the Introduction Potential of Small and Medium-Scale Hydropower
Generation
The suitability of the equipment capacity of a virtual power plant was checked bycomparing it to the maximum output of existing power plants. To be more precise, some 30
existing power plants were selected on the conditions that the plant is a run-of-river plant andits intake and outlet are both located along the same river. For each of these, the equipment
capacity of the virtual plant of which the locations, elevation and gradient of the intake andoutlet points were determined to be similar to those of the existing power plant as much as
possible was calculated for comparison withthe maximum output of the existing power
plant in question. Initially, no correlation was
found as the value of the coefficient ofdetermination (R2) was 0.0256 (value ofintercept = 0). However, more detailed
examination was conducted for those sites
where the comparison results were judged to
be greatly under-estimated or over-estimated.
As a result of removing those sites for which
the causes of under-estimation or overestimation were identified, the coefficient ofdetermination (R2) improved to 0.5185 (valueof intercept = 0), confirming sufficientcorrelation between the two sets of power
plants.
11,000立石

10,0009,000

y = 1.075x
R² = 0.0256

8,000

最大出力（kW）

7,000

尻別第一

赤松(東海パルプ）

6,000

赤松(昭和電工)

長拇

5,000

中村

新小滝

4,000

樫尾

川又

3,000

青田

臼田

舌崎

関川

銚子第一

新楠川

2,000

茂庭

鳥並

1,000

中津川
市原

向原
忍野
花合野川 津金
川下 名村川
梶並
滝ノ上

00

1,000

2,000

窪田

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,00011,000

設備容量（kW）

Fig. 1

S‐2

Comparison Results of the Maximum Outputof Existing Power Plants and Equipment
Capacity of Virtual Power Plants

(4) Refinement of the Introduction Potential of Geo-Heat (Heat Pump)
A bibliographic survey and interview survey were conducted, and updated the prerequisite
for the purpose of refining the introduction potential. As a result of these, the introduction
potential was estimated to be 1,321 billion MJ/year.

Fig.2

Distribution Map ofAmount of Geo-HeatIntroduction

Fig.3

S‐3

Distribution Map of Introduction Amount of
Geo-Heat (Larger sample figures)(5) Refinement of the Introduction Potential of Solar Heat
A bibliographic survey and interview survey were conducted to refine the introduction
potential of solar heat by revising the existing data on the amount of solar radiation, heatcollection efficiency, categories of target buildings and demand characteristics, etc. by
category of individual buildings. As a result, the introduction potential was estimated to be435.5 to 489.8 billion MJ/year.
2. Consolidation and Transmission of Basic Zoning Information(1) Consolidation and Transmission of Basic Zoning Information on PV Power
Generation for Public Buildings
An interview survey was conducted with those administrative bodies with jurisdiction forthe categories where the increased introduction of PV power generation is hoped for. Thissurvey featured actual examples of introduction, relevant policies and plans, available
assistance for introduction and constraints and the findings were compiled in a standardized
case file format.
(2) Consolidation and Transmission of Basic Zoning Information on Wind Power
Generation
Constraints for the introduction of wind power generation were listed and the relevant
information was gathered. Among the different categories of information gathered, somecategories were considered to be more significant than others. These are “flight route radar”,“areas above the approach surface and other restricted surfaces”, “principal fishing grounds”
and “designated training areas for US military forces” and GIS data for these categories werecreated. A questionnaire survey was conducted with 47 prefectural governments, 103 port
management bodies and 111 municipalities with a high level of introduction potential andtheir intentions to introduce wind power generation were plotted on a map.

Fig.4

Area Above Approach Surface and Other
Restricted Surfaces (Example: Amami Airport)

S‐4

Fig.5

Map Showing Level of Intentions toIntroduce Wind Power Generation(3) Consolidation and Transmission of Basic Zoning Information on Small and MediumScale Hydropower Generation
Using a secondary mesh (10 km x 10 km) of which the total introduction potential is 7,500
kW or higher, 30 promising sites in view of the distribution of the equipment capacity ofvirtual power plants, link length and topography were selected. A discharge duration curve
was then prepared for each promising site based on therelative ratio of the catchment area for the site and thecatchment area for the relevant block, in turn based on
the discharge duration curve by block prepared by thisstudy in FY 2009. A questionnaire survey wasconducted with 28 prefectural governments of which thejurisdiction areas contain these 30 promising sites for the
purpose of checking the intentions of these local
governments to introduce small and medium-scalehydropower generation. Based on the findings of thisquestionnaire survey and the opinions expressed by theadvisors, an image of a standardized cased file format
organizing information on promising virtual power
plants (one selected from each mesh) was prepared fromthe viewpoint of providing necessary information tofacilitate the development efforts of those bodies
intending to proceed with the development of small andmedium-scale hydropower generation.
Fig.6 Image of the Standardized Case File Format(4) Consolidation and Transmission of Basic Zoning Information on Geothermal Power
Generation
A questionnaire survey was conducted with 10
prefectural governments with a high introduction
potential for geothermal power generation and 10 hot
spring associations of which the geographical areas
have a high concentration of sites with introduction
potential. A map plotting the intentions of these
prefectural governments and associations was thenproduced.

Fig.7

S‐5

Map of Intentions of Introducing
Geothermal Power Generation

(5) Consolidation and Transmission of Basic Zoning Information on Geo-Heat
Utilisation (Heat Pump)
The latest information on three subject matters was gathered and sorted to prepare GIS dataon industrial water-related national laws and municipal ordinances. The subject matters werec laws relating to general restrictions on the use of geo-heat, d laws and municipal
ordinances relating to restrictions on groundwater extraction and e municipal ordinances
relating to effluent standards and requirements for ground infiltration. In addition, useful
information for the introduction of heat pumps using geo-heat was arranged by geographicalarea and information which could be developed into GIS data was sorted using thestandardized case file format. An interview survey was also conducted with administrative
offices with jurisdiction for those categories where the increased introduction of heat pumps
using geo-heat was especially hoped for. The subject matters of this survey included actual
cases of introduction, relevant policies and promotion plans, available support forintroduction and constraints. The findings of this survey were then arranged using thestandardized case file format.
(6) Consolidation and Transmission of Basic Zoning Information on Solar HeatUtilization
Solar radiation data by geographical area was gathered and a map showing the said data
was produced.

Fig.8 Solar Radiation Map by Geographical Area
3.

Public Release of Basic Zoning Information and Examination of an Information
SystemData from the Study in FY 2012 and FY 2013 for public release was produced wile
information to be handled at the portal site for renewable energies was examined by means ofsorting out the principal needs concerning the promotion of the introduction of renewableS‐6energies. In addition, multiple tentative options for the information service system werecompared with reference to other information service sites.
Table 1 Comparison of Various Information Service Systems
Item
Main Targets

Composition andFunctions

Functions as a Portal Site

Information
Provided

Map Information

Operating
Cost/Year
Actual Examples

Possible Size of Cost

Construction Cost

Operation

Design andConstruction
Gathering andPreparation ofInformation forthe Website
Map Information
ServiceSub-TotalSystem
Management/Impr
ovement
Gathering andPreparation ofData for theWebsite
Sub-TotalPortal Site

Supply of Map
Information

Type 1Businesses andlocal
governments
Simplecomposition
with limited
functions,
including searchand topics
Information
relevant to theexamination ofbusiness start-up
potential

Type 3Businesses andlocal governments

Information
relevant to theexamination ofbusiness start-up
potential,
promotionmeasures andnews from local
governments
Distribution ofbasic minimum
information via
the website

Type 2+Businesses andlocal
governments
Acceptance of
information
inputs inaddition to
search andtopics functions
Information
relevant to theexamination ofbusiness start-up
potential,
promotionmeasures andnews from local
governments
Distribution ofbasic minimum
information via
the website

Response toenquiries as
required andpreparation andrenewal of data at
an appropriate
time

Response toenquiries as
required andpreparation andrenewal of dataat an appropriate
time

Response toenquiries as
required andpreparation andrenewal of data at
an appropriate
time

Deployment of an
exclusive operator andpreparation andrenewal of data at an
appropriate time

Low

Rather Low

Rather High

Rather HighHighLow

Rather Low

MediumRather HighHigh－

Rather Low

Rather Low

Rather High

Rather HighLow

Rather Low

MediumRather High

High－Low

Low

Rather HighHighLow

Low

MediumRather High

Rather HighLow
Environmental
ImpactAssessment
Network, MoE
Present state(use of a simpleviewer)

Rather Low
Energy of
Fukuoka, Fukuoka
Prefectural
Government
Energy of
Fukuoka,
Fukushima
Prefectural
Renewal Energy
Database

Medium
Off-Site
Decontaminatio
n Measures Site,
MoE
Energy ofFukuoka,
Fukushima
Prefectural
Renewal Energy
Database

Rather HighOff-Site
Decontamination
Measures Site,
MoE
Off-Site
Decontamination
Measures Site,
MoE, Basic
Environmental
Information
Database SystemHigh
UnderstandingRenewal Energies,
MoE

Supply of GIS
data through asimpledownloading
tool
Simple text
information only

Type 2Businesses andlocal governments
Relatively simple
composition withlimited functions,
including searchand topics

S‐7

Acceptance of
information inputs
in addition tosearch and topics
functions
Information
relevant to theexamination ofbusiness start-up
potential,
promotionmeasures andnews from local
governments
Distribution ofdata through adatabase on thewebsiteType 4General public,
businesses and local
governments
Acceptance of
information inputs,
distribution of mailmagazines and videos
in addition to searchand topics functions
Information for thegeneral public plus
information relevantto the examination ofbusiness start-up
potential, promotion
measures and news
from local
governments
Distribution of data
through a database on
the website

Off-Site
Decontamination
Measures Site, MoE,
Basic Environmental
Information Database
System